There have been suggestions that a number of players could be on their way out of White Hart Lane, despite last summer's spending spree in the transfer market.
The Premier League outfit are said to have spent around £100m on seven new faces following the £85m sale of Gareth Bale to Real Madrid.
However, a number of the club's new recruits have failed to make a significant impact as Spurs currently sit sixth in the league table, eight points adrift of a Champions League spot.
Levy told the club's official website: "We have come far in the last decade – we have raised our expectations from a club aiming to be in the top half of the table, to competing in Europe each season, to the point at which we find ourselves disappointed if we don't make Champions League.
"This season we have had to make significant changes, both in respect of coaching and playing staff and yet we are currently only two points less than last season's tally. Whilst this season's performances and results have not lived up to expectation, we believe our squad has potential and it is important that we all now show commitment and teamwork to get the best possible finish to the season.
"Our focus therefore is to continue to invest in and develop the squad. We shall not look to a summer of major upheaval, but rather to strengthen in key positions, to play the style of football for which we are famous, and to deliver the new stadium."
The club have claimed that it is "feasible" for the new ground to be opened in the summer of 2017.